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Message-Id: <20191003154545.050926099@linuxfoundation.org>
Date: Thu, 3 Oct 2019 17:51:41 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org,
Liguang Zhang <zhangliguang@...ux.alibaba.com>,
Borislav Petkov <bp@...e.de>,
"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.2 123/313] ACPI / APEI: Release resources if gen_pool_add() fails
From: Liguang Zhang <zhangliguang@...ux.alibaba.com>
[ Upstream commit 6abc7622271dc520f241462e2474c71723638851 ]
Destroy ghes_estatus_pool and release memory allocated via vmalloc() on
errors in ghes_estatus_pool_init() in order to avoid memory leaks.
[ bp: do the labels properly and with descriptive names and massage. ]
Signed-off-by: Liguang Zhang <zhangliguang@...ux.alibaba.com>
Signed-off-by: Borislav Petkov <bp@...e.de>
Link: https://lkml.kernel.org/r/1563173924-47479-1-git-send-email-zhangliguang@linux.alibaba.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
drivers/acpi/apei/ghes.c | 17 +++++++++++++++--
1 file changed, 15 insertions(+), 2 deletions(-)
diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c
index 993940d582f50..6875bf629f16e 100644
--- a/drivers/acpi/apei/ghes.c
+++ b/drivers/acpi/apei/ghes.c
@@ -153,6 +153,7 @@ static void ghes_unmap(void __iomem *vaddr, enum fixed_addresses fixmap_idx)
int ghes_estatus_pool_init(int num_ghes)
{
unsigned long addr, len;
+ int rc;
ghes_estatus_pool = gen_pool_create(GHES_ESTATUS_POOL_MIN_ALLOC_ORDER, -1);
if (!ghes_estatus_pool)
@@ -164,7 +165,7 @@ int ghes_estatus_pool_init(int num_ghes)
ghes_estatus_pool_size_request = PAGE_ALIGN(len);
addr = (unsigned long)vmalloc(PAGE_ALIGN(len));
if (!addr)
- return -ENOMEM;
+ goto err_pool_alloc;
/*
* New allocation must be visible in all pgd before it can be found by
@@ -172,7 +173,19 @@ int ghes_estatus_pool_init(int num_ghes)
*/
vmalloc_sync_all();
- return gen_pool_add(ghes_estatus_pool, addr, PAGE_ALIGN(len), -1);
+ rc = gen_pool_add(ghes_estatus_pool, addr, PAGE_ALIGN(len), -1);
+ if (rc)
+ goto err_pool_add;
+
+ return 0;
+
+err_pool_add:
+ vfree((void *)addr);
+
+err_pool_alloc:
+ gen_pool_destroy(ghes_estatus_pool);
+
+ return -ENOMEM;
}
static int map_gen_v2(struct ghes *ghes)
--
2.20.1
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